Oak Ridge Lake Estates, IA
Lead detected, under the action levels
Latest 90th-percentile lead: 1 ppb (monitoring period 2023-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
Who runs the water here
Oak Ridge Lake Estates serves about 88 people through 22 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Johnson County, Iowa. EPA system ID: IA5225302; phone on file: 319-393-5381. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
That is down 9 ppb from 10 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Oak Ridge Lake Estates is 10 ppb across 7 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1 ppb |
| 2022 | 10 ppb |
| 2021 | 10 ppb |
| 2020 | 2 ppb |
| 2020 | 3 ppb |
| 2019 | 3 ppb |
| 2016 | 0 (not detected) |
Against other Iowa systems
Of the 1,066 Iowa systems with a lead result, the median latest reading is 1.4 ppb; 4 are over 15 ppb right now and 36 have gone over at some point. Oak Ridge Lake Estates's 1 ppb sits at the 40th percentile in Iowa and the 51st nationally (higher means more lead).
Neighbouring systems
74 other systems share Johnson County; 36 of them have a higher latest lead result than Oak Ridge Lake Estates. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Iowa City Water Department | 68,753 | 4 ppb |
| University Water System | 47,136 | 0 (not detected) |
| North Liberty Water Supply | 23,276 | 0 (not detected) |
| Coralville Muni Water System | 22,318 | 3 ppb |
| Tiffin Water Supply | 7,577 | 0 (not detected) |
| Solon Water Dept | 3,018 | 7 ppb |
| Lone Tree Muni Water System | 1,357 | 2 ppb |
| Lake Ridge, Incorporated | 1,300 | 0 (not detected) |
| Modern Manor, Inc | 915 | 1 ppb |
| Hills Water Supply | 863 | 2 ppb |
Next steps for Cedar Rapids, IA
Test your own tap with a certified lab first-draw sample; Cedar Rapids, IA may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Oak Ridge Lake Estates whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1400 ppb (copper action level 1,300 ppb).
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. What a 90th-percentile result does and does not tell you: how to read a lead result. Size matters more than most people expect: small vs large water systems.